{"id":221755,"date":"2022-07-28T01:06:39","date_gmt":"2022-07-28T01:06:39","guid":{"rendered":"\/forum\/forums\/topic\/2d-axisymmetric-supersonic-flow-simulation\/"},"modified":"2022-07-28T01:06:39","modified_gmt":"2022-07-28T01:06:39","slug":"2d-axisymmetric-supersonic-flow-simulation","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/2d-axisymmetric-supersonic-flow-simulation\/","title":{"rendered":"2D axisymmetric Supersonic flow simulation"},"content":{"rendered":"<p>Hi all,<\/p>\n<p>I try to analyze the front shock of a heat shield (red graph), and it seems to be messed up somewhere since the shock never comes out clear but lots of small waves within the shocks. I tried to make a bigger flow field or small size of the mesh but it did not seem to be working.<\/p>\n<p>So I took a step back and just do an angled hill and test from there (blue graph) but it also seems to be not working because that happens again even after 30,000 iterations or become invalid due to high residuals.<\/p>\n<p>My goal is to try to analyze the front shock of a heat shield which is shown in the Mach graph, ignoring the backflow. But I can&#8217;t get a clean shock, and I keep getting waves within the shocks. So I took a step back to use an angled hill to test out the flow. But it still won&#8217;t converge, and appear some reflect waves within the shock in the blue graph.<\/p>\n<p>For some reason, my flow keeps messing up even creating multiple different meshes. The following pictures are my setups and simulation results. I hope you guys can help me out.<\/p>\n<p>Solver: Density-based (I tried Pressure based, but it also didn&#8217;t work)<br \/>Turbulence model: Laminar ( I also tried spalart allamars)<br \/>Velocity inlet from left to right as the pressure outlet<br \/>the bottom is the axis, and the top is used as the wall but it is pretty far from the shock.<\/p>\n<p>the wall is in the right corner where a hill-shaped bump. (so the bottom be like three lines, axis &#8211; wall &#8211; wall )<\/p>\n<p>Velocity speed (960 m\/s )<br \/>initial pressure (52 pa for high altitude )<br \/>material: air<br \/>density: ideal gas<br \/>viscosity: Sutherland law<br \/>energy: on (automatic for ideal gas)<\/p>\n<p><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2022\/07\/28-07-2022-1658970366-Capture.GIF\" alt=\"\"><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2022\/07\/28-07-2022-1658970385-Capture2.GIF\" alt=\"\"><\/p>\n","protected":false},"template":"","class_list":["post-221755","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Hi all,I try to analyze the front shock of a heat shield (red graph), and it seems to be messed up somewhere since the shock never comes out clear but lots of small waves within the shocks. I tried to make a bigger flow field or small size of the mesh but it did not\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/2d-axisymmetric-supersonic-flow-simulation\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.10\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Ansys Learning Forum | Ansys Innovation Space\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"2D axisymmetric Supersonic flow simulation | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"Hi all,I try to analyze the front shock of a heat shield (red graph), and it seems to be messed up somewhere since the shock never comes out clear but lots of small waves within the shocks. I tried to make a bigger flow field or small size of the mesh but it did not\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/2d-axisymmetric-supersonic-flow-simulation\/\" \/>\n\t\t<meta property=\"og:image\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2022\/07\/28-07-2022-1658970366-Capture.GIF\" \/>\n\t\t<meta property=\"og:image:secure_url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2022\/07\/28-07-2022-1658970366-Capture.GIF\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2022-07-28T01:06:39+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2022-07-28T01:06:39+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"2D axisymmetric Supersonic flow simulation | Ansys Learning Forum\" \/>\n\t\t<meta name=\"twitter:description\" content=\"Hi all,I try to analyze the front shock of a heat shield (red graph), and it seems to be messed up somewhere since the shock never comes out clear but lots of small waves within the shocks. I tried to make a bigger flow field or small size of the mesh but it did not\" \/>\n\t\t<meta name=\"twitter:image\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2022\/07\/28-07-2022-1658970366-Capture.GIF\" \/>\n\t\t<script type=\"application\/ld+json\" class=\"aioseo-schema\">\n\t\t\t{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/2d-axisymmetric-supersonic-flow-simulation\\\/#breadcrumblist\",\"itemListElement\":[{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/#listItem\",\"name\":\"Topics\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/#listItem\",\"position\":2,\"name\":\"Topics\",\"item\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/2d-axisymmetric-supersonic-flow-simulation\\\/#listItem\",\"name\":\"2D axisymmetric Supersonic flow simulation\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum#listItem\",\"name\":\"Home\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/2d-axisymmetric-supersonic-flow-simulation\\\/#listItem\",\"position\":3,\"name\":\"2D axisymmetric Supersonic flow simulation\",\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/topics\\\/#listItem\",\"name\":\"Topics\"}}]},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#organization\",\"name\":\"Ansys Learning Forum\",\"description\":\"Ansys Innovation Space\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/2d-axisymmetric-supersonic-flow-simulation\\\/#webpage\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/2d-axisymmetric-supersonic-flow-simulation\\\/\",\"name\":\"2D axisymmetric Supersonic flow simulation | Ansys Learning Forum\",\"description\":\"Hi all,I try to analyze the front shock of a heat shield (red graph), and it seems to be messed up somewhere since the shock never comes out clear but lots of small waves within the shocks. I tried to make a bigger flow field or small size of the mesh but it did not\",\"inLanguage\":\"en-US\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#website\"},\"breadcrumb\":{\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/forums\\\/topic\\\/2d-axisymmetric-supersonic-flow-simulation\\\/#breadcrumblist\"},\"datePublished\":\"2022-07-28T01:06:39+00:00\",\"dateModified\":\"2022-07-28T01:06:39+00:00\"},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#website\",\"url\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/\",\"name\":\"Ansys Learning Forum\",\"description\":\"Ansys Innovation Space\",\"inLanguage\":\"en-US\",\"publisher\":{\"@id\":\"https:\\\/\\\/innovationspace.ansys.com\\\/forum\\\/#organization\"}}]}\n\t\t<\/script>\n\t\t<!-- All in One SEO -->\n\n","aioseo_head_json":{"title":"2D axisymmetric Supersonic flow simulation | Ansys Learning Forum","description":"Hi all,I try to analyze the front shock of a heat shield (red graph), and it seems to be messed up somewhere since the shock never comes out clear but lots of small waves within the shocks. I tried to make a bigger flow field or small size of the mesh but it did not","canonical_url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/2d-axisymmetric-supersonic-flow-simulation\/","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"BreadcrumbList","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/2d-axisymmetric-supersonic-flow-simulation\/#breadcrumblist","itemListElement":[{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum#listItem","position":1,"name":"Home","item":"https:\/\/innovationspace.ansys.com\/forum","nextItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/topics\/#listItem","name":"Topics"}},{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/topics\/#listItem","position":2,"name":"Topics","item":"https:\/\/innovationspace.ansys.com\/forum\/topics\/","nextItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/2d-axisymmetric-supersonic-flow-simulation\/#listItem","name":"2D axisymmetric Supersonic flow simulation"},"previousItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum#listItem","name":"Home"}},{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/2d-axisymmetric-supersonic-flow-simulation\/#listItem","position":3,"name":"2D axisymmetric Supersonic flow simulation","previousItem":{"@type":"ListItem","@id":"https:\/\/innovationspace.ansys.com\/forum\/topics\/#listItem","name":"Topics"}}]},{"@type":"Organization","@id":"https:\/\/innovationspace.ansys.com\/forum\/#organization","name":"Ansys Learning Forum","description":"Ansys Innovation Space","url":"https:\/\/innovationspace.ansys.com\/forum\/"},{"@type":"WebPage","@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/2d-axisymmetric-supersonic-flow-simulation\/#webpage","url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/2d-axisymmetric-supersonic-flow-simulation\/","name":"2D axisymmetric Supersonic flow simulation | Ansys Learning Forum","description":"Hi all,I try to analyze the front shock of a heat shield (red graph), and it seems to be messed up somewhere since the shock never comes out clear but lots of small waves within the shocks. I tried to make a bigger flow field or small size of the mesh but it did not","inLanguage":"en-US","isPartOf":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/#website"},"breadcrumb":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/2d-axisymmetric-supersonic-flow-simulation\/#breadcrumblist"},"datePublished":"2022-07-28T01:06:39+00:00","dateModified":"2022-07-28T01:06:39+00:00"},{"@type":"WebSite","@id":"https:\/\/innovationspace.ansys.com\/forum\/#website","url":"https:\/\/innovationspace.ansys.com\/forum\/","name":"Ansys Learning Forum","description":"Ansys Innovation Space","inLanguage":"en-US","publisher":{"@id":"https:\/\/innovationspace.ansys.com\/forum\/#organization"}}]},"og:locale":"en_US","og:site_name":"Ansys Learning Forum | Ansys Innovation Space","og:type":"article","og:title":"2D axisymmetric Supersonic flow simulation | Ansys Learning Forum","og:description":"Hi all,I try to analyze the front shock of a heat shield (red graph), and it seems to be messed up somewhere since the shock never comes out clear but lots of small waves within the shocks. I tried to make a bigger flow field or small size of the mesh but it did not","og:url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/2d-axisymmetric-supersonic-flow-simulation\/","og:image":"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2022\/07\/28-07-2022-1658970366-Capture.GIF","og:image:secure_url":"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2022\/07\/28-07-2022-1658970366-Capture.GIF","article:published_time":"2022-07-28T01:06:39+00:00","article:modified_time":"2022-07-28T01:06:39+00:00","twitter:card":"summary_large_image","twitter:title":"2D axisymmetric Supersonic flow simulation | Ansys Learning Forum","twitter:description":"Hi all,I try to analyze the front shock of a heat shield (red graph), and it seems to be messed up somewhere since the shock never comes out clear but lots of small waves within the shocks. I tried to make a bigger flow field or small size of the mesh but it did not","twitter:image":"https:\/\/innovationspace.ansys.com\/forum\/forum\/wp-content\/uploads\/sites\/2\/2022\/07\/28-07-2022-1658970366-Capture.GIF"},"aioseo_meta_data":{"post_id":"221755","title":null,"description":null,"keywords":null,"keyphrases":null,"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"content","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":null,"og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":true,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"","isEnabled":true},"graphs":[]},"schema_type":"default","schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":null,"robots_max_videopreview":null,"robots_max_imagepreview":"large","priority":null,"frequency":null,"local_seo":null,"limit_modified_date":false,"created":"2024-10-28 19:13:15","updated":"2024-10-28 19:13:15","ai":null,"breadcrumb_settings":null,"seo_analyzer_scan_date":null},"aioseo_breadcrumb":"<div class=\"aioseo-breadcrumbs\"><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/innovationspace.ansys.com\/forum\" title=\"Home\">Home<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/innovationspace.ansys.com\/forum\/topics\/\" title=\"Topics\">Topics<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\t2D axisymmetric Supersonic flow simulation\n\t\t<\/span><\/div>","aioseo_breadcrumb_json":[{"label":"Home","link":"https:\/\/innovationspace.ansys.com\/forum"},{"label":"Topics","link":"https:\/\/innovationspace.ansys.com\/forum\/topics\/"},{"label":"2D axisymmetric Supersonic flow simulation","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/2d-axisymmetric-supersonic-flow-simulation\/"}],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["256261","22555"],"_bbp_author_ip":["23.213.52.60"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["239"],"_edit_lock":["1658979599:76739"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["221755"],"_bbp_forum_id":["27792"],"_bbp_engagement":["22555","256261"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["222560"],"_bbp_last_active_id":["222560"],"_bbp_last_active_time":["2022-07-28 13:17:57"]},"test":"zijing-zhengsjsu-edu"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/221755","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/221755\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=221755"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}